EP 1425735 A4 20051109 - PITCH DETERMINATION METHOD AND APPARATUS ON SPECTRAL ANALYSIS
Title (en)
PITCH DETERMINATION METHOD AND APPARATUS ON SPECTRAL ANALYSIS
Title (de)
TONHÖHENBESTIMMUNGSVERFAHREN UND VORRICHTUNG ZUR SPEKTRALANALYSE
Title (fr)
PROCEDE ET APPAREIL PERMETTANT DE DETERMINER UNE HAUTEUR TONALE PAR ANALYSE SPECTRALE
Publication
Application
Priority
- KR 0201498 W 20020808
- KR 20010047777 A 20010808
Abstract (en)
[origin: WO03015077A1] A method and apparatus for detecting a pitch using frequency analysis are provided. An externally input digital signal is analyzed into frequency component values at predetermined time intervals, and positions of peaks of the digital signal are detected based on the frequency component values. It is determined whether a frequency at a maximum peak position among the peak positions is a pitch or a n-order harmonic frequency of the pitch to detect a pitch. Then, the range of the pitch is determined based on the range of a harmonic frequency of the detected pitch. Accordingly, an error range for the pitch detected using frequency analysis is minimized, thereby more exactly detecting a pitch when the pitch is detected using the frequency analysis.
IPC 1-7
IPC 8 full level
G10H 1/00 (2006.01); G10L 25/00 (2013.01); G10L 25/18 (2013.01); G10L 25/21 (2013.01); G10L 25/90 (2013.01)
CPC (source: EP KR US)
G10L 25/90 (2013.01 - EP KR US)
Citation (search report)
- [A] EP 0538877 A2 19930428 - MICOM COMMUNICATIONS CORP [US]
- [A] US 4384335 A 19830517 - DUIFHUIS HENDRIKUS [NL], et al
- See references of WO 03015077A1
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR IE IT LI LU MC NL PT SE SK TR
DOCDB simple family (publication)
WO 03015077 A1 20030220; AT E377821 T1 20071115; CN 1271594 C 20060823; CN 1539136 A 20041020; DE 60223391 D1 20071220; DE 60223391 T2 20080828; EP 1425735 A1 20040609; EP 1425735 A4 20051109; EP 1425735 B1 20071107; JP 2004538525 A 20041224; KR 100347188 B1 20020803; US 2004225493 A1 20041111; US 7493254 B2 20090217
DOCDB simple family (application)
KR 0201498 W 20020808; AT 02755953 T 20020808; CN 02815478 A 20020808; DE 60223391 T 20020808; EP 02755953 A 20020808; JP 2003519928 A 20020808; KR 20010047777 A 20010808; US 48606504 A 20040205